Fuel-governor for oil-engines.



No. 734,421. PATENTED JULY 21.1903.

A. KREBs.

EUEL GOVERNOR EOE OIL ENGINES.

APPLICATION FILED NOV. 10

2 SHEETS-SHEET 1.

No MODEL.

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PATENTED JULY V2l, 1903.

' A. KREBS.

FUEL GOVERNOR 'FOR OIL ENGINES.

SHEETS-SHEET z.

vAPE'LIJATION FILED NOV. 10, 1902.

' UNITED l STATES.

Patented July 21, 190e, i

PATENT "OFFICE,

ARTHUR xRERs, oE PARIs, FRANCE, AssIeNoR To s ooiErE ANONYME DEs ANCIENS ETABLISSEMENTS PANHARD Er LEvAssoR, CE PARIS, FRANCE.

FuEL-co'vERNoR-,FQR.CIL-ENG|NEs.

SPECIFICATION forming part of Letters Patent N o. 734,421, dated July 21, 1903. Application filed November 10, 1,902` .SerialNo. 190,800. (No model.)

Toa/ZZ whom t may concern.- Y f v .Y

Be it known that I, ARTHUR KREEs,1eng-i neer, a citizen of the French Republic, residing at 19 Avenue dIvry, Paris, France, have invented certain new Yand useful Improvements in Fuel-Governors fori-Oil-E1igines, of which the following' isa specification.'

This invention relates' to fuel-governors for oil-engines and hasfor'ev-its object toinsure that the compositionof the combustible mixture supplied to the cylinder shall be constant,

which is necessary in order toinsure the proper working ofLv the engine whatever mayf be its speed or the power exertedfby-itf The arrangement mostly used hitherto has an inj ecting-nozzle and "a constantfoil-level and is so adj usted asto insure a given supply cor-` responding to given conditions;- but under this arrangement it'is 'necessary-for the proper working 'of the'engine to'depa'rt from this when, for instance, iny order to maintainv a given speed it becomes vnecessary to exert power proportional to the resistance ,to be overcome. Under such conditions then'umber of strokes is constant, but the powergiven' invention the admission of air is varied.

Hitherto this result was obtained by devices working independently of the engine and adjusted by trial by the driver, to whose judgment has been left entirely the proper setting of such (devices, and the devices in question have not been satisfactorylin operation. In the arrangements in accordance' with the present invention the air-supply is regulated automatically'according t'o the Vamount v'ofsuction, a supplemental air-inlet, supplying ad- 'ditional air according torequirements by lcausing the engine to vary the sectional area n lof-the supplemental air-inlet, so that the 5o amount of airn'ecessary to keep the composition of the explosive mixtuieconstant is supplied-as hereinafter explained.

Thefollowing description will yclearly explain this invention with reference to the accompanying drawings, of which- Figure 1 shows 'a section of the apparatus mixture being open.

` The apparatus consists of three principal parts.` YThe iirst part comprises the main airvinlet, consisting of'a pipe a, communicating .atA one end with -the atmosphere through an elbow band at the other end with the atomizing chamber c.

Into this air-inlet pipe opens an injecting-nozzle d, the lower end of which communicates with a chamber e, connected to the oil-reservoir, (not shown in the drawings,) so that the level of the oil in the nozzle is kept constantly a little below its aperture. e

The second part of the invention relates to the mechanism which controls the admission of combustible mixture to the engine and comprises a hollow valve f, sliding easily in a chamber g, communicating withthc atomizin g-chamber o and closed at the otherend. The said hollow valve is provided with a stem h, connected to the engine-governor, and the chamber g is provided with a peripheral port i, communicating with the exhaust-pipe j, by which the combustible mixture passes to the engine-cylinder. The periphery of the said hollow valve f preferably has triangular openings, so that the combustible mixture is gradually throttled when ,the said hollow valve approaches the end of its outward stroke.

The third part of the inventionl relates to the mechanism which constitutes the automatic regulating device and comprises supplemental air-inlets m, which be situated lwith lthe supplemental air-inlet closed and the `outlet for the explosive mixture nearly closed. ,Fig. 2 is a similar view of the apparatus, the supplemental air-inlet and the outlet for the at any part of the apparatus provided they communicate with the atomizing-chamber c or the chamber g, containing the aforesaid hollow valve. A hollow piston 7a slides easily in a chamber Z, communicating with the atomizing-chambcr c, so as to control the a-irinlet orifices m in the chamber l, in which it moves. The said hollow piston 7c is connected by a stem n to a regulating-head p, moving freely in a large chamber 0, the joint between the said regulating-head and its chamber being made by an elastic and impervious diaphragm q, connected with the said regulating-head and chamber. The regulating-head moves in its chamber without friction in consequence of its being connected by the aforesaid diaphragm. A spring lr normally forces the said regulating-head against the outer end of its chamber. One side of the regulating-head communicates with the atmosphere through a hole s, provided in the outer end of the chamber, this hole being of a small diameter in order to prevent the vibrations of the piston. When the regulating-head, controlled by the suction of the engine, is forced by the spring against the outer end of its chamber, the hollow piston 7s, connected with it, closes the aforesaid supplemental airinlets m.

The operation of the apparatus is as lIollows: lVhen the engine is at work, its speed is governed by the position of the hollow valve f, connected with the governor, which controls the passage z' for combustible mixture through the said valve. When the engine is running at a low speed, the combustible mixture passes to the engine cylinder through the triangular openings, Fig. l, of the said hollowr valve and the suction-stroke of the engine-piston tends to create a vacuum in the atomizing-chamber, whereupon air will be caused to enter vthrough the normal or main air-inlet c. and oil to issue from the noz- '/.le d, opening into the said inlet. The regulating-head 1J, which communicates on one side with the atomizing-chamber through the hollow piston attached to it, is also acted upon by the suction in the atomizing-chamber, and when the engine runs at a higher speed, which corresponds to the admission of a larger quantity of combustible mixture to the cylinder, the hollow valve f uncovers the passage for combustible mixture through the hollow valve to a larger extent. An increase in the suction causes the regulatinghead 1J to further compress its spring 7^ and the hollow piston attached thereto to move, so as to uncover more or less the supplemental air-inlets m in the chamber surrounding this hollow piston, so th at an additional quantity of air (depending upon the area of these openings and the suction beneath the regulating-head) enters the atomizing-chamber c and mixes with the mixture issuing from the main inlet-pipe, so that the proportion of air to oil drawn in by the engine is automatically kept constant.

The section of the main air-inlet a and the initial pressure exerted on the regulating-head by the spring r are calculated in such amanner that the suction in the atomizing-chamber c, caused by the unloaded engine running at its lowest speed, does not cause the inlets for additional air to be uncovered.

l-laving now particularly described and ascertained the nature of my invention, and in what manner the same is to be performed, I declare that what I claim is-` l. A device of the class described embodying a main air-supply, fuel-injecting means coacting therewith, an atomizing-chamber, an exhaust-conduit, means actuated by the engine-governor to control the passage of the explosive from the atomiZing-chamber to the conduit, and a supplemental air-supply controlled by the suction-stroke of the engine.

2. A device of the class described embodying a main air-supply, fuel-injecting means coactin g therewith, an atomizing-chamber, an exhaust-conduit, a valve actuated by the engine-governor to control the passage of the explosive from the atomizing-chamber to the conduit, and a supplemental air-supply controlled by the suction-stroke of the engine.

3. A device ofthe class described embodying a main air-supply, fuel-injecting means coacting therewith, an atomizingchamber, an exhaust-conduit, a Valve provided with a notched periphery and actuated by the engine-governor to Control the passage of the explosive from the atomizing-chamber to the conduit, and a supplemental air-supply controlled by the suction-stroke 4of the engine,

4. A device of the class described embodying a main air-supply, fuel-injecting means coacting therewith, an atomizing-chamber,an exhaust-conduit, a hollow valve actuated by the engine-governor to control the passage of the explosive from the atomizing-chamber to the conduit, and a hollow piston controlled by the suction-stroke of the engine and controlling supplemental air-supply inlets.

5. A device of the class described embodying a main air-supply, Jfuel-injecting means coactin g therewith, an atomizing-cha1nbe1,an eXhaustconduit, a hollow valve having a notched periphery and actuated by the enginegovernor to control the passage of the explosive from the atomizing-chamber to the conduit, a regulating-head controlled by the suction of the engine having a hollow piston operatively connected therewith, and supplemental air-inlets controlled by the piston.

6. A device of the class described embodying a main air-supply, fuel-injecting means coactin g therewith, an atomizing-chamber, an eXhaustconduit, a hollow valve having a notched periphery and actuated by the en gine governor to control the passage of the explosive ii'rom the atomizing-chamber to the con- IOO IIG

duit, a regulating-head*controlled by the sucmy hand in presence of two subscribing Wt. tion of the engine and embodying a chamber, nesses. v a movable plate and diaphragm arranged in the chamber, and a spring-controlled piston i ARTHUR KREBS' 5 operatively connected with the diaphragm to Witnesses:

control supplemental air-inlets. EMILE KLoTZ,

In testimony whereof I have hereunto set EDWARD P. MACLEAN. 

